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Digital Experience PlatformApplication · Liferay

CVE-2025-43820

MEDIUM · 5.4 CVSS v3.1 Published 2025-09-29
Fix available
A fix is available. Upgrade to 7.4.3.111 / 2023.Q3.7 or later.
See remediation →
58/100
Remediation priority · Elevated
Remotely reachable

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Multiple cross-site scripting (XSS) vulnerabilities in the Calendar widget when inviting users to a event in Liferay Portal 7.4.3.35 through 7.4.3.110, and Liferay DXP 2023.Q4.0 through 2023.Q4.4, 2023.Q3.1 through 2023.Q3.6, 7.4 update 35 through update 92, and 7.3 update 25 through update 35 allow remote attackers to inject arbitrary web script or HTML via a crafted payload injected into a user’s (1) First Name, (2) Middle text, or (3) Last Name text fields.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

Stored XSS vulnerability in LPortal's Calendar widget where user profile fields (First Name, Middle Name, Last Name) are not sanitized when displaying invited event attendees, allowing injected JavaScript/HTML to execute in victims' browsers.

MitigationUpdate to LPortal 7.4.3.111+, 2023.Q4.5+, or respective patched versions; implement output encoding on user display fields in the Calendar widget.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Digital Experience PlatformApplication
Affected:>= 2023.Q3.1, < 2023.Q3.7>= 2023.Q4.0, < 2023.Q4.5= 7.3= 7.4
Liferay PortalApplication
Affected:>= 7.4.3.35, < 7.4.3.111

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Determine LPortal/Liferay version
    Access the Control Panel > Configuration > Server Administration > Global Preferences, or check the bundle properties file (portal-impl.properties or portal-ext.properties) for the version number. Alternatively, append /c/portal/version to the base URL.
    Affected if The installed version falls within >= 7.4.3.35 and < 7.4.3.111, or between 2023.Q3.1 and 2023.Q3.6, or between 2023.Q4.0 and 2023.Q4.4, or equals 7.3 or 7.4.
  2. Confirm Calendar widget deployment
    Navigate to the Control Panel > Apps > Widgets, or inspect the deployed web applications (WAR files) in the application server, and verify whether the Calendar portlet/widget is installed and active.
    Affected if The Calendar widget is present and enabled in the environment.
  3. Identify user profile configuration
    Go to Control Panel > Users > Users and Organizations, select a user, and examine the profile fields (First Name, Middle Name, Last Name) under the Profile section. These fields store the data displayed in event attendee lists.
    Affected if User profile fields contain names that could contain unsanitized HTML/JavaScript.
  4. Check for event attendee functionality
    Create or view a Calendar event, invite other users as attendees, and then view the event details page where the attendee list is displayed. The vulnerability triggers when viewing this attendee list.
    Affected if Calendar events with attendees have been created and are viewable by other users.

The environment is affected if the installed LPortal/Liferay version is within the vulnerable ranges AND the Calendar widget with event attendee functionality is in use.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 7.4.3.111 / 2023.Q3.7 / 2023.Q4.5 or later
Fixed in 7.4.3.1112023.Q3.72023.Q4.5
Interim mitigation

Update to LPortal 7.4.3.111+, 2023.Q4.5+, or respective patched versions; implement output encoding on user display fields in the Calendar widget.

Recommended fix High confidence

Lificar Portal 7.4.3.111+; DXP 2023.Q3.7+; DXP 2023.Q4.5+; DXP 7.4 update 93+; DXP 7.3 update 36+

  1. 1. Identify the exact Lificar Portal or DXP version currently running in your environment
  2. 2. Based on your current version, determine the appropriate fixed release: For Lificar Portal 7.4.3.x, upgrade to 7.4.3.111 or later; For DXP 2023.Q3.x, upgrade to 2023.Q3.7 or later; For DXP 2023.Q4.x, upgrade to 2023.Q4.5 or later; For DXP 7.3, upgrade to a version after update 35; For DXP 7.4, upgrade to a version after update 92
  3. 3. Review Lificar's upgrade documentation and release notes for the target version
  4. 4. Perform a full backup of your database and file system before upgrading
  5. 5. Test the upgrade in a non-production environment first
  6. 6. Deploy the upgrade during a scheduled maintenance window
  7. 7. Verify the Calendar widget functionality after upgrade
Caveat Standard Lificar upgrade considerations apply - review breaking changes in release notes, test customizations and plugins for compatibility

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Digital Experience Platform Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA2.0 h
20.0 hours of engineering $3,500
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-43820 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data